I also face a install problem, so I thought to post it here in this part:
I was flying the IXEG 1.21 and wanted to update to 1.3. Following Error ocurred:
There has been an error.
Error running /Users/thomasaeschlimann/Fliegerei/Simulation/X-Plane 11/X-Plane 11/X-Aviation/Uninstall IXEG 737 Classic.app/Contents/MacOS/installbuilder.sh : /Users/thomasaeschlimann/Fliegerei/Simulation/X-Plane 11/X-Plane 11/X-Aviation/Uninstall IXEG 737 Classic.app/Contents/MacOS/installbuilder.sh: line 18: /Users/thomasaeschlimann/Fliegerei/Simulation/X-Plane 11/X-Plane 11/X-Aviation/Uninstall IXEG 737 Classic.app/Contents/MacOS/osx-intel: Bad CPU type in executable
The application will exit now.
I tried both Gizmo options and in the end I also deleted the whole x-aviation folder, always with the same error while installing.
I would also appreiciate some helping hints... Thank you